<template>
	<!-- 拼团商品规格弹窗 -->
	<su-popup :show="show" round="10" @close="emits('close')">
		<view class="ss-modal-box bg-white ss-flex-col">
			<view class="modal-header ss-flex ss-col-center">
				<view class="header-left ss-m-r-30">
					<image class="sku-image" :src="sheep.$url.cdn(state.selectedSkuPrice.image || goodsInfo.image)"
						mode="aspectFill">
					</image>
				</view>
				<view class="header-right ss-flex-col ss-row-between ss-flex-1">
					<view class="goods-title ss-line-2">
						<view class="tig ss-flex ss-col-center">
							<view class="tig-icon ss-flex ss-col-center ss-row-center">
								<view class="groupon-tag">
									<image :src="sheep.$url.static('/static/img/shop/goods/groupon-tag-white.png')">
									</image>
								</view>
							</view>
							<view class="tig-title">拼团价</view>
						</view>
						<view class="info-title">
							{{ goodsInfo.title }}
						</view>
					</view>
					<view class="header-right-bottom ss-flex ss-col-center ss-row-between">
						<view class="price-text"> {{ goodsPrice }}</view>

						<view class="stock-text ss-m-l-20">
							库存{{ state.selectedSkuPrice.stock || goodsInfo.stock }}件
						</view>
					</view>
				</view>
			</view>
			<view class="modal-content ss-flex-1">
				<scroll-view scroll-y="true" class="modal-content-scroll">
					<view v-if="grouponAction === 'create' && activityType === 'groupon_ladder'"
						class="sku-item ss-m-b-20">
						<view class="label-text ss-m-b-20">拼团人数</view>
						<view class="ss-flex ss-col-center ss-flex-wrap">
							<button v-for="(ladder, key) in goodsInfo.activity.rules.ladders" :key="key"
								class="ss-reset-button spec-btn" :class="[
                  {
                    'checked-btn': grouponNum == ladder,
                  },
                ]" @tap="onSelectLadder(ladder)">
								{{ ladder }}人团
							</button>
						</view>
					</view>
					<view class="sku-item ss-m-b-20" v-for="sku1 in goodsInfo.skus" :key="sku1.id">
						<view class="label-text ss-m-b-20">{{ sku1.name }}</view>
						<view class="ss-flex ss-col-center ss-flex-wrap">
							<button class="ss-reset-button spec-btn" v-for="sku2 in sku1.children" :class="[
                  {
                    'checked-btn': state.currentSkuArray[sku2.parent_id] == sku2.id,
                  },
                  {
                    'disabled-btn': sku2.disabled == true,
                  },
                ]" :key="sku2.id" :disabled="sku2.disabled == true" @tap="onSelectSku(sku2.parent_id, sku2.id)">
								{{ sku2.name }}
							</button>
						</view>
					</view>
					<view class="buy-num-box ss-flex ss-col-center ss-row-between">
						<view class="label-text">购买数量</view>
						<su-number-box :min="1" :max="state.selectedSkuPrice.stock" :step="1"
							v-model="state.selectedSkuPrice.goods_num" activity="groupon"></su-number-box>
					</view>
				</scroll-view>
			</view>
			<view class="modal-footer ss-p-y-20">
				<view class="buy-box ss-flex ss-col-center ss-flex ss-col-center ss-row-center">
					<view class="ss-flex">
						<button class="ss-reset-button origin-price-btn ss-flex-col">
							<view class="btn-title">{{
                grouponNum === 0 ? '阶梯团' : grouponNum + '人团'
              }}</view>
						</button>
						<button class="ss-reset-button btn-tox ss-flex-col" @tap="onBuy">
							<view class="btn-price">
								{{
                  grouponAction === 'create' && goodsInfo.activity.rules.is_leader_discount == 1
                    ? leaderPrice
                    : goodsPrice
                }}
							</view>
							<view v-if="
                  grouponAction === 'create' && goodsInfo.activity.rules.is_leader_discount == 0
                ">立即开团</view>
							<view v-else-if="
                  grouponAction === 'create' && goodsInfo.activity.rules.is_leader_discount == 1
                ">团长立减价</view>
							<view v-else-if="grouponAction === 'join'">参与拼团</view>
						</button>
					</view>
				</view>
			</view>
		</view>
	</su-popup>
</template>

<script setup>
	import {
		computed,
		reactive,
		watch
	} from 'vue';
	import sheep from '@/sheep';
	import {
		formatPrice
	} from '@/sheep/hooks/useGoods';
	import {
		isEmpty
	} from 'lodash';

	const headerBg = sheep.$url.css('/static/img/shop/goods/groupon-btn-long.png');
	const emits = defineEmits(['change', 'addCart', 'buy', 'close', 'ladder']);
	const props = defineProps({
		show: {
			type: Boolean,
			default: false,
		},
		goodsInfo: {
			type: Object,
			default () {},
		},
		grouponAction: {
			type: String,
			default: 'create',
		},
		grouponNum: {
			type: [Number, String],
			default: 0,
		},
	});
	const state = reactive({
		selectedSkuPrice: {},
		currentSkuArray: [],
		grouponNum: props.grouponNum,
	});
	// 默认单规格
	if (!props.goodsInfo.is_sku) {
		state.selectedSkuPrice = props.goodsInfo.sku_prices[0];
	}

	// 活动类型
	const activityType = props.goodsInfo.activity_type;

	// 可选规格
	const skuPrices = computed(() => {
		let skuPrices = props.goodsInfo.sku_prices;
		if (props.goodsInfo.is_sku) {
			skuPrices.forEach((item) => {
				item.goods_sku_id_arr = item.goods_sku_ids.split(',');
			});
		}
		return skuPrices;
	});

	const skuList = props.goodsInfo.skus;

	// 规格价格
	const goodsPrice = computed(() => {
		if (isEmpty(state.selectedSkuPrice)) {
			return formatPrice(props.goodsInfo.price);
		}
		if (props.grouponNum === 0 && activityType === 'groupon_ladder') {
			return formatPrice(props.goodsInfo.price);
		}

		if (activityType === 'groupon') {
			return state.selectedSkuPrice.groupon_price;
		}
		if (activityType === 'groupon_ladder') {
			const ladder = getSkuPriceByLadder();
			state.selectedSkuPrice.ladder_price = ladder.ladder_price;
			return ladder.ladder_price;
		}
	});

	// 团长优惠
	const leaderPrice = computed(() => {
		if (isEmpty(state.selectedSkuPrice)) {
			return formatPrice(props.goodsInfo.price);
		}

		if (props.grouponNum === 0 && activityType === 'groupon_ladder') {
			return formatPrice(props.goodsInfo.price);
		}

		if (activityType === 'groupon') {
			return state.selectedSkuPrice.leader_price;
		}
		if (activityType === 'groupon_ladder') {
			const ladder = getSkuPriceByLadder();
			return ladder.leader_ladder_price;
		}
	});

	// 获取阶梯价
	function getSkuPriceByLadder() {
		return state.selectedSkuPrice.ladders.find((item) => item.ladder == props.grouponNum);
	}

	watch(
		() => state.selectedSkuPrice,
		(newVal) => {
			emits('change', newVal);
		}, {
			immediate: true, // 立即执行
			deep: true, // 深度监听
		},
	);

	// 点击购买
	function onBuy() {
		if (!state.selectedSkuPrice.goods_id) {
			sheep.$helper.toast('请选择规格');
			return;
		}
		if (state.selectedSkuPrice.stock <= 0) {
			sheep.$helper.toast('库存不足');
			return;
		}
		emits('buy', state.selectedSkuPrice);
	}

	// 改变禁用状态
	function changeDisabled(isChecked = false, pid = 0, skuId = 0) {
		let newPrice = []; // 所有可以选择的 skuPrice

		if (isChecked) {
			// 选中规格
			// 当前点击选中规格下的 所有可用 skuPrice
			for (let price of skuPrices.value) {
				if (price.stock <= 0) {
					// this.goodsNum 不判断是否大于当前选择数量，在 uni-number-box 判断，并且 取 stock 和 goods_num 的小值
					continue;
				}
				if (price.goods_sku_id_arr.indexOf(skuId.toString()) >= 0) {
					newPrice.push(price);
				}
			}
		} else {
			// 取消选中
			// 当前所选规格下，所有可以选择的 skuPrice
			newPrice = getCanUseSkuPrice();
		}

		// 所有存在并且有库存未选择的规格项 的 子项 id
		let noChooseSkuIds = [];
		for (let price of newPrice) {
			noChooseSkuIds = noChooseSkuIds.concat(price.goods_sku_id_arr);
		}

		// 去重
		noChooseSkuIds = Array.from(new Set(noChooseSkuIds));

		if (isChecked) {
			// 去除当前选中的规格项
			let index = noChooseSkuIds.indexOf(skuId.toString());
			noChooseSkuIds.splice(index, 1);
		} else {
			// 循环去除当前已选择的规格项
			state.currentSkuArray.forEach((sku) => {
				if (sku.toString() != '') {
					// sku 为空是反选 填充的
					let index = noChooseSkuIds.indexOf(sku.toString());
					if (index >= 0) {
						// sku 存在于 noChooseSkuIds
						noChooseSkuIds.splice(index, 1);
					}
				}
			});
		}

		// 当前已选择的规格大类
		let chooseSkuKey = [];
		if (!isChecked) {
			// 当前已选择的规格大类
			state.currentSkuArray.forEach((sku, key) => {
				if (sku != '') {
					// sku 为空是反选 填充的
					chooseSkuKey.push(key);
				}
			});
		} else {
			// 当前点击选择的规格大类
			chooseSkuKey = [pid];
		}

		for (let i in skuList) {
			// 当前点击的规格，或者取消选择时候 已选中的规格 不进行处理
			if (chooseSkuKey.indexOf(skuList[i]['id']) >= 0) {
				continue;
			}

			for (let j in skuList[i]['children']) {
				// 如果当前规格项 id 不存在于有库存的规格项中，则禁用
				if (noChooseSkuIds.indexOf(skuList[i]['children'][j]['id'].toString()) >= 0) {
					skuList[i]['children'][j]['disabled'] = false;
				} else {
					skuList[i]['children'][j]['disabled'] = true;
				}
			}
		}
	}

	// 当前所选规格下，获取所有有库存的 skuPrice
	function getCanUseSkuPrice() {
		let newPrice = [];

		for (let price of skuPrices.value) {
			if (price.stock <= 0) {
				// || price.stock < this.goodsNum		不判断是否大于当前选择数量，在 uni-number-box 判断，并且 取 stock 和 goods_num 的小值
				continue;
			}
			var isOk = true;

			state.currentSkuArray.forEach((sku) => {
				// sku 不为空，并且，这个 条 skuPrice 没有被选中,则排除
				if (sku.toString() != '' && price.goods_sku_id_arr.indexOf(sku.toString()) < 0) {
					isOk = false;
				}
			});

			if (isOk) {
				newPrice.push(price);
			}
		}

		return newPrice;
	}

	// 选择阶梯拼团人数
	function onSelectLadder(ladder) {
		emits('ladder', ladder);
	}

	// 选择规格
	function onSelectSku(pid, skuId) {
		// 清空已选择
		if (activityType === 'groupon_ladder' && props.grouponNum == 0) {
			sheep.$helper.toast('请选择拼团人数');
			return;
		}
		let isChecked = true; // 选中 or 取消选中
		if (state.currentSkuArray[pid] != undefined && state.currentSkuArray[pid] == skuId) {
			// 点击已被选中的，删除并填充 ''
			isChecked = false;
			state.currentSkuArray.splice(pid, 1, '');
		} else {
			// 选中
			state.currentSkuArray[pid] = skuId;
		}

		let chooseSkuId = []; // 选中的规格大类
		state.currentSkuArray.forEach((sku) => {
			if (sku != '') {
				// sku 为空是反选 填充的
				chooseSkuId.push(sku);
			}
		});

		// 当前所选规格下，所有可以选择的 skuPric
		let newPrice = getCanUseSkuPrice();
		// 判断所有规格大类是否选择完成
		if (chooseSkuId.length == skuList.length && newPrice.length) {
			newPrice[0].goods_num = state.selectedSkuPrice.goods_num || 1;
			state.selectedSkuPrice = newPrice[0];
		} else {
			state.selectedSkuPrice = {};
		}

		// 改变规格项禁用状态
		changeDisabled(isChecked, pid, skuId);
	}

	changeDisabled(false);
</script>

<style lang="scss" scoped>
	// 购买
	.buy-btn {
		margin: 0 20rpx;
		width: 100%;
		height: 80rpx;
		border-radius: 40rpx;
		background: linear-gradient(90deg, #ff6000, #fe832a);
		color: #fff;
	}

	.btn-tox {
		width: 382rpx;
		height: 80rpx;
		font-size: 24rpx;
		font-weight: 600;
		margin-left: -50rpx;
		background-image: v-bind(headerBg);
		background-repeat: no-repeat;
		background-size: 100% 100%;
		color: #ffffff;
		line-height: normal;
		border-radius: 0px 40rpx 40rpx 0px;

		.btn-price {
			font-family: OPPOSANS;

			&::before {
				content: '￥';
			}
		}
	}

	.origin-price-btn {
		width: 370rpx;
		height: 80rpx;
		background: rgba(#ff5651, 0.1);
		color: #ff6000;
		border-radius: 40rpx 0px 0px 40rpx;
		line-height: normal;
		font-size: 24rpx;
		font-weight: 500;

		.btn-price {
			font-family: OPPOSANS;

			&::before {
				content: '￥';
			}
		}

		.btn-title {
			font-size: 28rpx;
		}
	}

	.ss-modal-box {
		border-radius: 30rpx 30rpx 0 0;
		max-height: 1000rpx;

		.modal-header {
			position: relative;
			padding: 80rpx 20rpx 40rpx;

			.sku-image {
				width: 160rpx;
				height: 160rpx;
				border-radius: 10rpx;
			}

			.header-right {
				height: 160rpx;
			}

			.close-icon {
				position: absolute;
				top: 10rpx;
				right: 20rpx;
				font-size: 46rpx;
				opacity: 0.2;
			}

			.goods-title {
				font-size: 28rpx;
				font-weight: 500;
				line-height: 42rpx;
				position: relative;

				.tig {
					border: 2rpx solid #ff6000;
					border-radius: 4rpx;
					width: 126rpx;
					height: 38rpx;
					position: absolute;
					left: 0;
					top: 0;

					.tig-icon {
						width: 40rpx;
						height: 40rpx;
						background: #ff6000;
						margin-left: -2rpx;
						border-radius: 4rpx 0 0 4rpx;

						.groupon-tag {
							width: 32rpx;
							height: 32rpx;
						}
					}

					.tig-title {
						font-size: 24rpx;
						font-weight: 500;
						line-height: normal;
						color: #ff6000;
						width: 86rpx;
						display: flex;
						justify-content: center;
						align-items: center;
					}
				}

				.info-title {
					text-indent: 132rpx;
				}
			}

			.price-text {
				font-size: 30rpx;
				font-weight: 500;
				color: $red;
				font-family: OPPOSANS;

				&::before {
					content: '￥';
					font-size: 24rpx;
				}
			}

			.stock-text {
				font-size: 26rpx;
				color: #999999;
			}
		}

		.modal-content {
			padding: 0 20rpx;

			.modal-content-scroll {
				max-height: 600rpx;

				.label-text {
					font-size: 26rpx;
					font-weight: 500;
				}

				.buy-num-box {
					height: 100rpx;
				}

				.spec-btn {
					height: 60rpx;
					min-width: 100rpx;
					padding: 0 30rpx;
					background: #f4f4f4;
					border-radius: 30rpx;
					color: #434343;
					font-size: 26rpx;
					margin-right: 10rpx;
					margin-bottom: 10rpx;
				}

				.checked-btn {
					background: linear-gradient(90deg, #ff6000, #fe832a);
					font-weight: 500;
					color: #ffffff;
				}

				.disabled-btn {
					font-weight: 400;
					color: #c6c6c6;
					background: #f8f8f8;
				}
			}
		}
	}

	image {
		width: 100%;
		height: 100%;
	}
</style>